Aging duration

However, an independent analysis of workroom levels of chromium in the three chromate production factories in the United Kingdom performed around 1950 indicated average levels for various phases in the process ranging from 0.0006 to 2.14 mg chromium(III)/m3 and from 0.002 to 0.88 mg chromium(VI)/m3 (Buckell and Harvey 1951). The importance of further follow-up of the cohort to confirm that the risk has declined with improvements in the working environment, of simultaneous analysis of such factors as age, duration of employment, and time since first exposure, and of examining smoking habits was emphasized (Davies et al. 1991). 

Hurbankova M, Kaiglova A. 1993. The changes of some immunological parameters in subjects exposed to asbestos in dependence on age, duration of exposure, radiological findings, and smoking habits. Zentralbl Hyg Umweltmed 195(l) 55-65. 

The absence of a reversal, and uncertainties about depositional continuity for paleosecular variation, make it difficult to assign an age (duration of sediment collection) to Kooken Cave on a paleomagnetic basis. Therefore, we used two other approaches to constrain the age present sediment accumulation rates in the cave, and elevation of the cave relative to local base-level. 

In 22 of 29 patients (76%) who were treated with low-pulse doses of methotrexate for rheumatoid arthritis, liver biopsy specimens showed variability in liver cell nuclear size, glycogenated nuclei, and fatty change. Occasionally there was mild portal infiltration with lymphocytes. There were no significant differences in age, duration of treatment, or cumulative dose amongst the cases. Serial increases in serum transaminases and/or alkaline phosphatase activity and development of hypoalbuminemia during treatment were indicators of development of liver disease (54). 

Figure 86. Stability of the internal surface area of a three-way catalyst washcoat as a function of temperature and aging duration in an air atmosphere. Reprinted with permission from ref [34], CO 1991 Society of Automotive Engineers, Inc.

The 52 patients were assigned to two groups (active and placebo) counterbalanced for age, duration of illness, clinical status on the Minnesota Multiphasic Personality Inventory (MMPI Greene, 1980), and scores on the HAMA scale. The active treatment group daily received 2 X 200 mg kavain or placebo for a period of 28 days. In addition to the baseline HAMA, outcomes were assessed on days 14 and 28 on HAMA, Adjective Checklist, physicians global impressions, and patient reports of side-effects. 

Effects of sample age, duration of exposure to shear and heat, may be very important and must be considered. In the demonstration scale phase, the operating configuration (e.g., batch, feed and bleed, continuous) specified for the production scale system must be used. Carefiil consideration must be given to the total pressure drop in the flow chaimels at the desired cross-flow velocity at the final concentration, to ensure proper design of the feed and recirculation pumps. 

The sm-face area and pore volumes of alumina samples were found to increase with increase in base to alkoxide molar ratio. Samples with ageing duration of 16 h and higher base / alkoxide, solvent ratios have mesopores whereas samples with no aging duration have only micropores. A highly distinct pore size distribution obtained for all the samples where conditions are standardised in terms of ageing duration, base / alkoxide mole ratio and IPA / water mole ratio. 

To maximise lead deposition, and to simulate the vehicle that spends its life doing city driving, two catalysts were aged on a dynamometer engine to a predominantly low temperature, low load fcycle. The cycle is summarized in Fig. 2, the ageing duration is 300 hrs. This represents 80K km on the road. 

Between 1975 and 1978, 942 cases of encephalopathy were registered in France, 72 with lethal end. Mainly bismuth subnitrate but also other salts such as subsalicylate, subcarbonate, or subsilicate were ingested in amounts between 5 and 20 g daily over periods of years before the disease was attributed to bismuth. However, toxic events due to shorter treatments were also reported [46,74-79]. Large differences in blood levels existed (72-2360 p.g/liter) [53,75-77,79-83]. There is no relation between blood level, age, duration, and amount of ingestion and severity... 

There were no marked differences In age, duration of the gout or serum uric acid values In the two groups (Table V). 

The higher Incidence of A.H. In gout age, duration of the gouty process, certa steroids), contact with lead and familial Is related to female sex. In drugs (particularly history of A.H. 

Fig. 21.15 The threshold aging temperature as a function aging duration for the established criteria used to indicate Cu/CHA SCR failures [6]. Copyright SAE International. Reprinted with permission from 2009-01-1282...

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